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For superb accuracies in “normal” manufacturing environments
Machining accuracy of the workpiece changes significantly due to ambient temperatures around the machine, heat generated by the machine, and heat generated in machining. The Thermo-Friendly Concept is the unique concept of “accepting” these temperature changes so that high accuracy can be achieved in normal factory environments with no special measures by the user.
  • Actual data for MB-46VA vertical machining center
  • Actual data for LB3000 EX Ⅱ CNC lathe

    Note: The data shown are actual data but do not represent guaranteed accuracies.

Benefits
  • Dimensional accuracy improved with high-volume machining
    By combining thermal deformation control with machining position, workpiece dimensional accuracy is improved even when a large number of workpieces are loaded.
    Case example Dimensional accuracy changes with high-volume machining Model: MB-66VA

    Note: The data shown are actual data but do not represent guaranteed accuracies.

  • Fewer tool compensation checks
    “Superb dimensional stability” means fewer compensation checks are required after the initial morning setup, regardless of shop temperature changes or afternoon/evening stoppages.
    Case example Tool length compensation timing (ø50 h7, Cp = 1.33) Model: LB3000 EX Ⅱ

Integrated machine design and control technology

The Thermo-Friendly Concept plays a principal role in our machine design. With simple machine designs and construction that equalize ambient temperatures, deformation is predictable, and complex torsion or tilting is controlled.
Moreover, Highly Accurate Compensation Technology (Okuma control [OSP] award winning innovation) effectively responds to deformation caused by changes in room temperature, frequent spindle speed changes, and non-coolant cutting.
With the Thermo-Friendly Concept (Manageable Deformation—Accurately Controlled), Okuma products provide unrivaled dimensional stability.

Thermo-Friendly Concept
Simplified machine construction /
Machine design that equalizes ambient temperature
“Manageable deformation” —structural designing for controlled machine expansion/contraction (predictable directions), with heat transmitted evenly.
  • Vertical Machining Center MB-46V
  • Thermally symmetric structure
    The key to manageable deformation control
    Thermally symmetric structure
  • Box-build structure
    Simple double-column structure for manageable thermal deformation
    Box-build structure
  • Thermally balanced structure
    Placement of front cover and back control cabinet allow for even conduction of heat
    Thermally balanced structure
CNC Lathe LB3000EX Ⅱ
Box slant bed

[Thermo-Friendly]
Extremely accurate deformation control

  • Thermo Active Stabilizer — Spindle (TAS-S)
    Thermal deformation of the spindle changes greatly both when the spindle is turning and when it is stopped, affecting machining accuracy.
    TAS-S considers not only spindle temperature information but also spindle rotation, spindle speed changes, and spindle stoppage. Thermal deformation of the spindle is accurately controlled even when spindle speed changes frequently.
    MB-46VA vertical machining center with 15,000 min-1 spindle

    Note: The data shown are actual data but do not represent guaranteed accuracies.

  • Thermo Active Stabilizer — Construction (TAS-C)
    When machining under changing ambient temperatures, machining dimensional changes are affected by expanding/contracting machine components as well as workpiece position with respect to the table in machining centers and workpiece size in lathes.
    TAS-C, based on machine thermal characteristics, with appropriately placed temperature sensors and feed axis position data, will predict and accurately control thermal deformation in machine construction when ambient temperatures change.
    Outline of thermal deformation control (TAS-S, TAS-C)